Dust-collector



(No Model.)

T. WATSON:

DUST COLLECTOR.

Patented Mar. 19, 1889.

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TALBOT WATSON, OF BALTIMORE, MARYLAND.

DUST-COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 399,713, dated March19, 1889.

Application filed July 27, 1388. Serial No. 281,254. (No model.)

To all whom it may concern.-

Be it known that I, TALBOT \VATSON, a citizen of the United States,residing at Baltimore, in the State of Maryland, have invented certainnew and useful Improvements in Dust- Oollectors; and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the letters and figures of reference marked thereon, which form apart of this specification.

My invention relates to improvements in dust collectors which areemployed in flouring-mills and like establishments for separating thedust from the dust-laden air which is driven therethrough, and isdeposited in a receptacle therefor, and which I accomplish by thedevices hereinafter fully described and claimed, reference being had tothe accompanying drawings, in which- Figure 1 is a perspective view ofthe collector. Fig. 2 is a view looking down on the devlce, a part ofthe top removed and show inga part of the interior in section. Fig. 3shows a vertical section through the device, indicated by the line so.50 in Fig. 2. Fig. 4. is an enlarged detail cross-sectional view of thebrushes and the casings therefor, as shown in Fig. Fig. 5 is an enlargeddetail side elevation of the brush-casing, a part of one outer casingbeing removed and showing the shield and roller of brush, the view inthis figure being indicated by the sectional line 1 y in Fig. 2.

The same figures refer to the same or similar parts throughouttheseveral views.

7 denotes the outer box or casing, which is constructed of therectangular form, the lower end of which terminates in the hopper 8, thefloor 9 of the box serving to divide the hopper therefrom and likewiseform a support for the vertical rollers 10, by which the straining-cloth11. is kept in the extended. position and movement imparted thereto, thesaid rollers 10 being placed in the box, one near each corner thereof,as represented in Figs. 1 and 2. The cloth 11, being stretched aroundthe outside of the said rollers and of just the depth of the inside ofthe box 7, forms the walls of an interior compartment, 13, and wherebyan outer space, 12, will be provided completely around the inside of thebox 7 between the sides of the box and the cloth. In order to renderthis outer space, 12, dust-tight, the cover 14c of the box is extendedover that part which forms upper supports for the rollers 10, suitableprojecting strips, 32, being placed around this open top 1i, againstwhich travels the upper edge of the cloth 11, and prevents the passageof the dust therethrough, any of the devices in common use beingemployed to render tight the bottom edge of the cloth 11, which movesover the floor 9.

To impartmovement to the cloth 11 through the rollers 10, the spindles15 of the rollers are extended through the cover 1i, and are providedwith suitable pulleys, 16, around which passes from one roller-pulley tothe other the endless belt 17, by which all the rollers are caused torotate in unison and movement given to the cloth 11,0ne of the saidspindles being providedwith a driving-pulley, 18, by which movement isimparted to the whole by steam or other power. On one side of the box isprovided an opening, 19, through which the dust-laden air enters that isto be deprived of its dust, and which has been forced therethrough by ablower or some like device under a slight pressure, the dust-laden airentering the box and being distributed around the outer space, 12,thereof, and from thence, in consequence of the pressure exerted by theincoming current, the air will be forced through the texture of thecloth l1, and escape to the atmosphere through the open top of thisinner compartment, 13, the air in its passage through the cloth 11having been strained and leaving the dust particles in the outercompartment, 12, the bulk of these par ticles adhering to this side ofthe cloth, those particles which do not adhere to the cloth falling tothe bottom of the outer space, 12, which is made in the hopper formshown in Fig. 3, a valve, 21, which is operated from outside the box,forming the floor thereofnvhereby the accumulated dust may at intervalsbe discharged into the hopper 8.

In order to remove those particles of dust which adhere to the side ofthe cloth, the re tating brushes 22 and23 are provided, which serve tobrush these dust particles therefrom as the cloth passes therebetween bythe movement imparted through the rollers in the manner described. Thesebrushes 22 and 23 extend about the depth of the cloth 11, and are incontact therewith, the upper spindles thereof being extended through thetop 14 of the box and provided with the pulleys 29 thereon, which may bedriven by the endless belt 17, that drives the rollers, orindependentmeans may be employed for imparting a rotating movement thereto. Thebrush 22, which is placed in the outer space, 12, serves to remove thedust which has adhered to this side of the cloth 1l,the brush 23 beingplaced on the other side of the cloth 11 and opposite the brush 22,whereby the said brushes form a backing one for the other, and preventany undue agitation to the cloth by the rotating movement thereof in itspassage therebetween, the brush 23 likewise serving to remove anyparticles of dust which may have been driven through the cloth.

In order to provide a still-air compartment into which the dust isdriven and allowed to quietly settle and fall into the hopper, the saidbrushes 22 and 23 have around them. sheet-iron shields 24, that have onthe side thereof the opening 25, which extends vertically nearly orwholly the length thereof, as shown in Fig. 5, through which the dust,when released by the brush, will escape into the still-air compartment26, formed by the walls 30, that completely ineases the said brushes andtheir shields 24, wherein the dust will be free from any agitation bythe rotating brushes or other causes, and will quietly fall to thebottom and drop through the openings 27 therein to the hoppers, thewalls 30,

, that form the still-air compartment, being ex- To facilitate theremoval of the dust from the brushes and cause it to enter the still-aircompartment, the rollers 31 are provided, which are supported bysuitable bearings from the walls 30, in which they are free to rotate,the said roller extending nearly or wholly the length of the brush, asshown in Figs. 3 and 5, and pressing against the bristles thereof,whereby when the bristles pass thereover, moving in the directionindicated by the arrows in Fig. 4, they will be slightly bent when incontact therewith, and when released assume their straight form, thus bytheir elasticity causing the dust from the brush to be thrown throughopening 25 in the shield and into the still-air compartment, fromwhence, as described, it falls into the hopper 8.

Having described my invention and the manner of operating, what I claim,and desire to secure by United States Letters Pat ent, is

1. In a dust-collector, the combination, with an upright dust-arrestingcloth, means for directing the dust-laden air against one side thereof,a rotating brush for dislodging the dust therefrom, and a roller fordislodging the dust from the said rotating brush, for the purpose setforth.

2. In a dust-collector, the combination, with an upright dust-arrestingcloth, means for directing the dust against one side thereof, a rotatingbrush for dislodging the dust therefrom, a shield, 24, provided with theopening 25 therein, placed around the said brush, and a still-aircompartment formed by the walls 30, which completely incases the saidbrush and shield 24, for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

TALBOT WATSON.

VVit-nesses:

WM. L. BAILIE, JNo. T. MADDox.

